Boiler.



J. J. GAIN.

BOILER.

APPLICATION man MAR.21.1917.

Llm l Y Pate11tedApr.23,1918.

JOHN J'. GAIN, OF BAYONNE, NEW JERSEY.

BOILER.

incassi.

Specification of Letters Patent.

Patented. Apr. 23, tm.

Application led March 27, 191'?. Serial No. 157,673.

To all whom t may concern:

Be it known. that l, JOHN J. GAIN, residing` at Bayonne, county of Hudson, State of New Jersey, have invented new and useful Improvements in Boilers, of which the following is a specification.

This invention pertains to that class of boilers composed of sections transversely arranged and connected together with commu nicating passages between them.

The object of this invention is to simplify the construction of such boilers, to strengthen the sections against expansion and contraction effects and to increase the eiiiciency by fully utilizing all parts of the sections as heating surfaces. are formed with their adjacent sides as continuous surfaces and their interiors are formed by a one-piece core, said adjacent surfaces being horizontally corrugated and spaced apart to provide parallel sinuous passages for the adequate How of the products of combustion from the furnace in upward and lateral directions, which from its lateral flow passes around the side edges of the sections. The sections have at the lower parts of their sides supporting legs and the spaces between these legs constitute the fire box. The lower parts of the legs and the central upper parts of the sectionsl are wider than the corrugated body portions, they are formed to contact and determineA the width of the passages between the main portions, they are provided with connecting nipples, or other suitable means, for affording communication between the interiors of all of the sections. Flues, longitudinally the boiler, pass through the water, or water and steam, spaces of the sections, being formed by short pipe pieces cast integral with the sections and arranged to abut in the gas passages between the sections. These flues open into ay connecting chamber in the front wall of the boiler; one, the discharge flue passes through the back wall and the open ends of the other flues face toward the front side of the back wall.

To direct the How of gases around the side edges and over the tops of the sections toward the back wall casings are provided, preferably composed of insulating material. A suitable construction for this purpose being fire bricks formed with projections to act as baile plates, sheet asbestos on the outerV side of the fire bricks and a sheet To this end the sections l direct the metal casing or container surrounding the asbestos and adequately secured to the boiler.

These features with other details of construction will now be fully described by reference had to the accompanying drawings, in which:

Figure l, is a half full View and a half sectional view of the front wall of a boiler embodying this invention.

Fig. 2, an elevation of one of the component sections of the boiler, showing one-half full face view and one-half in section.

Fig. 3, shows different views of assembled sections; 5 being afull edge view of a section; 6, a central sectional view on line 6, 6, Fig. 2; 7 another vertical section on line 7, 7, Fig. 2, and 8, an edge view of the back wall; and:

Fig. 4, a plan sectional view of two of the component sections, taken on line 4.-, 4c, Figs. l and 2.

All of the sections transversely arranged between the front and back walls and constituting practically the whole of the boiler are alike. They may be shaped as shown in Fig. 2, with the side edges 9, vertical, but their general contour may be varied to suit different kinds and styles of boilers. Each section has a large central opening 10, at its lower part, preferably arch shaped, which in the assembled sections form the fire chamber. The adjacent faces of the widened portions 1l, contact and their sur faces at the inner sides of the legs form continuous side walls for the fire box, so that the fuel will be properly contained therein. The top surfaces of the parts ll, in the spaces between the faces of adjacent sections, incline downwardly toward the fire at an angle sulicient to prevent pieces of coal and ashes lodging thereon, as shown in Figs. 2 and 3. Said inclined surfaces constitute the bottoms of the side flues and will gases from the furnace upwardly through the flues and around the outer edges of the sections. rlhe portions at the sides of these openings form the supporting legs and lower ends 11, are Wider than their main portions, as is also a portion 12, at the central part of the upper edge. The faces of these widened `parts are in parallel planes which also include the projecting edges of short pieces of pipe forming flues 13, and 14, thus facilitating the necessary tooling of these faces to insure the proper seating together of them when the sections are assembled. The excess of these widened parts over that of the main port-ions determine the widthv of the passages for the productsA of combustionbetween the sections. The sections are, of course, hollow and are constructedy with all their parts integral, their interiors being formed by a one-piece core. This provides a very simple construction, as will be seen. from an inspection of Fig. 2. The Whole of the narrow main portions of the sections are cerrugated'in 'a horizontal direction, that is the straight linesof the corrugations run laterally, in such manner that the spaces 15, between adjacent sections are lparallel in Vboth direcf tions and sinuous in a vertical direction.

This formation while adding greatly to their strength against expansion and contraction also vincreases the vertical length of the flues and consequently adds to their heating surfaces. The side edges 9, are preferably rounded,"as may also the upper edges 16 and the edges in the re box. All parts of thel sinuous'flues 15, are of uniform width., their corrugated walls being parallel, thus insuring steady uniform flows of the gases in both vertical and horizontal directions and uniformity in heating effects on all parts of the sections.

The front 17, is also cast hollow and has formeel in it a chamber 18, into which the lfront ends of 'the lines 18, and 14C open to afford communication between them at this end of the boiler. The rear end of the fine 14, passes through the back wall 8, and is connected to the discharge pipe or chimney, as at 19, Fig. .3. The sections are suitably clampedr together; rods or bolts and nuts Q0, may be used( for thisk purpose, located as shown and extending through lugs 21, formed on the edges of the front and back Walls. Tight joints may be made between they wide parts 11 and 12, and the ends of the short pieces of pipe forming the flues 13 and 14.-, by the application thereto of a suitable cement; it is preferred however to provide a mechanical connection between the interiors of the sections and the front and back walls, as for instance `by means of ordinary push nipples 22.

The water supply V0r return water may enter the lboiler at the central partlof the back wall, as at'23, and the hot water when the boiler is used ina hot water system, or steam, when the boiler is used in a steam system, passes from a rvpipe openingv Qa,

formed in the'top offa section. This opening maybe lformed in all of the sections,

to assist in holding thel core during the casting process, and 4those not required for water or steam discharge be suitably plugged.

The sides andtop edges ofthe section are covered by a casing, to direct the horizontal and vertical flow of the gases from the furnace lire box 10, through the spaces 15, longitudinally toward the back wall 8. A suitable construction for this easing is shown, consisting of lire bricks 25, which may have lateral projections QG, suitably perforated if necessary, to act as baille plates, a sheet of insulating material Q7, as asbestos, arranged against the outer side of the fire bricks and a sheet metal container 28, suitably secured to the boiler by angle pieces 29, and straps 30.

Any desired number of sections may be assembled to form different sizes of boilers, and according to the sizes of the sections. The last section, orl one next the back wall 8, may be made without the opening 10, it then becoming the back of the furnace, causing the direct rearward flow of the gases from the furnace to pass around its edges and between its rear face and the back wall 8.

Ba'lie plates or blocks 81, may be placed as desired in various parts of the passages 15, to adequately retard the flow of the gases therethrough; said baliies being held in set positions by the reverse curvatures of the passages.

3Q, esignates the foundation of the boiler on which the various sections rest, and" which forms the ash pit 33; 85, the ash pit door; 86, the tire box door; 37, the ydoor covering the clinker discharge or slicing opening, 3S, and 39, covers for closing the chamber 18, in the front and for cleaning the flues 13, and 1i; and 40, the grate.

T claim:

1. A boiler, comprising transverse sections provided with side supporting legs having at tieir lower parts contacting wide portions lengthwise the boiler, the openings between the legs of each section forming the fire chamber and the inner sides of the wide portions constituting continuous side walls for the lire box at the lower part of the chamber, the sections above the wide lower portions of the legs being spaced apart to provide continuous lateral passages from the lire chamber to the top and sides of the boiler, a back wall and a front wall, a grate located in the lire box between its continuous side walls, ca'sings at the sides of the boiler inclosing the side edges of the `sections and affording passages lengthwise the boiler to direct the gases from the spaces between vthe sections to the back wall and flues affording communication between the space at the front of the back wall and the outside ofthe boiler.

2. A boiler, comprising transverse sections provided with side supporting legs having at their lower parts contacting wide portions lengthwise the boiler, the openings between the legs of each section forining'the fire chamber and the inner sides of 

